If your goal is to export Lotus Notes emails to PST, you’ll need a conversion tool because Outlook doesn't support NSF files. I’ve used the eSoftTools NSF to PST Converter, and it performs well even with large NSF files.

It converts emails, contacts, calendars, journals, and archives without modifying the original NSF file. The ability to preview all mailbox items before export makes it easier to verify data.

A good option for anyone transitioning from Lotus Notes to Microsoft Outlook.

Free download: https://www.esofttools.com/nsf-to-pst-converter.html
kNow More - https://www.esofttools.com/blog/ultimate-guide-to-convert-nsf-to-pst/